nvim: Use nvim_command for disabling back ups and swap

Using the vim.o API seems to have no effect for these three options. Set
them via the 'nvim_command' API.

nvim/.config/nvim/lua/init.lua

@@ -17,9 +17,6 @@ vim.o.joinspaces         = false
 vim.o.showmode           = false
 vim.o.splitbelow         = true
 vim.o.splitright         = true
-vim.o.backup             = false
-vim.o.writebackup        = false
-vim.o.swapfile           = false
 vim.o.foldenable         = false
 vim.o.undofile           = true
 vim.o.hidden             = true
@@ -96,6 +93,10 @@ vim.api.nvim_command('set backspace=indent,eol,start')
 vim.api.nvim_command('set diffopt=filler,internal,algorithm:histogram,indent-heuristic')
 -- Load out custom colorscheme
 vim.api.nvim_command('colorscheme yolokai')
+-- Do not create any backups or swap file
+vim.api.nvim_command('set nobackup')
+vim.api.nvim_command('set nowritebackup')
+vim.api.nvim_command('set noswapfile')
 
 require 'plugins'
 require 'autocmd'